Vinyl can be waxed. But as Black said, just don't do it on PlastiDip.
For Vinyl make sure it's a carnauba wax or a synthetic that explicitly states it will not discolor plastics. Some cheap sythentics might discolor the vinyl.
I use Klasse, old school synthetic that works like a champ, affordable and easy to work with.
2011 V6 Race Red - Airaid CAI , BBK 73mm Throttle Body, 3.73 FRPP Gears, BBK Longtube Headers , BBK Off Road X-Pipe , Borla ATAKs , SR Performance Strut Tower Brace, MPT 91R Tune, Powerstop Rotors and pads, JLT Oil Seperator, Koni STR.T Struts & Shocks, Eibach Pro Line Springs, BMR Adjustable Panhard Bar, J&M Caster Camber Plates, Mickey Thompson Street Comps on 19" Laguna Seca Hyper Black Wheels, Several other aesthetic mods